<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div{
				width: 100px;
				height: 100px;
			}
			.lipan{
				height: 600px;
				width: 600px;
				background-color: bisque;
				position: relative;
				left: 10px;
				
			}
			.box1{
				background: #000000;
			}
			.box2{
				/* 绝对定位：元素会脱离文档流 */
				background: #FF0000;
				position: absolute;
				left: 200px;
				top: 30px;
			
			}
			.box3{
				background: #00FFFF;
			}
		</style>
	</head>
	<body>
		<div style="height: 200px;">
			
		</div>
		<div class="lipan">
			<div class="box1"></div>
			<div class="box2"></div>
			<div class="box3"></div>
			
		</div>
		
	</body>
</html>
